Example usage for io.netty.buffer ByteBuf readByte

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf readByte.

Prototype

public abstract byte readByte();

Source Link

Document

Gets a byte at the current readerIndex and increases the readerIndex by 1 in this buffer.

Usage

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTP20WireFormat.java

License:Apache License

/**
 * Read enough bytes from buffer to deduce the remote protocol version in a backwards compatible
 * ZMTP handshake./*  ww  w .j  av  a2  s.  c  o  m*/
 *
 * @param in the buffer of data to determine version from.
 * @return The detected {@link ZMTPVersion}.
 * @throws IndexOutOfBoundsException if there is not enough data available in buffer.
 */
static ZMTPVersion detectProtocolVersion(final ByteBuf in) {
    if (in.readByte() != (byte) 0xff) {
        return ZMTPVersion.ZMTP10;
    }
    in.skipBytes(8);
    if ((in.readByte() & 0x01) == 0) {
        return ZMTPVersion.ZMTP10;
    }
    return ZMTPVersion.ZMTP20;
}

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From source file:com.srotya.sidewinder.core.ingress.binary.SeriesDataPointDecoder.java

License:Apache License

public static DataPoint decodeBufToDPoint(ByteBuf buf) {
    int dbNameLength = buf.readInt();
    if (dbNameLength < 0) {
        return null;
    }/*from  www. j  av a2 s.  co m*/
    byte[] dbBytes = new byte[dbNameLength];
    buf.readBytes(dbBytes);
    String dbName = new String(dbBytes);
    int measurementNameLength = buf.readInt();
    if (measurementNameLength < 0) {
        return null;
    }
    byte[] measurementNameBytes = new byte[measurementNameLength];
    buf.readBytes(measurementNameBytes);
    String measurementName = new String(measurementNameBytes);

    int valueNameLength = buf.readInt();
    if (valueNameLength < 0) {
        return null;
    }
    byte[] valueNameBytes = new byte[valueNameLength];
    buf.readBytes(valueNameBytes);
    String valueFieldName = new String(valueNameBytes);
    long timestamp = buf.readLong();
    byte flag = buf.readByte();
    DataPoint dp;
    if (flag == '0') {
        double value = buf.readDouble();
        dp = new DataPoint(dbName, measurementName, valueFieldName, null, timestamp, value);
        dp.setFp(true);
    } else {
        long value = buf.readLong();
        dp = new DataPoint(dbName, measurementName, valueFieldName, null, timestamp, value);
    }
    return dp;
}

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From source file:com.streamsets.pipeline.lib.parser.net.netflow.v5.NetflowV5Decoder.java

License:Apache License

@Override
public List<NetflowV5Message> parse(int netflowVersion, int packetLength, boolean packetLengthCheck,
        ByteBuf buf, InetSocketAddress sender, InetSocketAddress recipient) throws OnRecordErrorException {
    if (!readHeader) {
        // 2-3//from   w ww . jav a2  s. co  m
        count = buf.readUnsignedShort();
        if (count <= 0) {
            throw new OnRecordErrorException(Errors.NETFLOW_01, Utils.format("Count is invalid: {}", count));
        } else if (packetLengthCheck && packetLength < V5_HEADER_SIZE + count * V5_FLOW_SIZE) {
            String msg = Utils.format("Readable bytes {} too small for count {} (max {})", packetLength, count,
                    (V5_HEADER_SIZE + count * V5_FLOW_SIZE));
            throw new OnRecordErrorException(Errors.NETFLOW_01, msg);
        }
        readerId = String.valueOf(recipient);
        // 4-7
        uptime = buf.readUnsignedInt();
        // 8-11
        seconds = buf.readUnsignedInt();
        // 12-15
        nanos = buf.readUnsignedInt();

        millis = nanos / 1000000;

        // java timestamp, which is milliseconds
        timestamp = (seconds * 1000L) + millis;
        packetId = UUIDs.startOfJavaTimestamp(timestamp);

        // 16-19
        flowSequence = buf.readUnsignedInt();
        // 20
        engineType = buf.readUnsignedByte();
        // 21
        engineId = buf.readUnsignedByte();
        // the first 2 bits are the sampling mode, the remaining 14 the interval
        // 22-23
        sampling = buf.readUnsignedShort();
        samplingInterval = sampling & 0x3FFF;
        samplingMode = sampling >> 14;
        readHeader = true;
        parentDecoder.doCheckpoint();
    }

    while (readIndex < count) {
        //ByteBuf flowBuf = buf.slice(V5_HEADER_SIZE + (readIndex * V5_FLOW_SIZE), V5_FLOW_SIZE);

        NetflowV5Message msg = new NetflowV5Message();
        msg.setSeconds(seconds);
        msg.setNanos(nanos);
        msg.setCount(count);

        // 0
        int srcaddr = (int) buf.readUnsignedInt();
        // 4
        int dstaddr = (int) buf.readUnsignedInt();
        // 8
        int nexthop = (int) buf.readUnsignedInt();
        // 12
        msg.setSnmpInput(buf.readUnsignedShort());
        // 14
        msg.setSnmpOnput(buf.readUnsignedShort());

        msg.setPacketId(packetId.toString());
        msg.setSender((sender == null) ? "unknown" : sender.getAddress().toString());
        msg.setLength(packetLength);
        msg.setUptime(uptime);
        msg.setTimestamp(timestamp);
        msg.setFlowSequence(flowSequence);
        msg.setEngineId(engineId);
        msg.setEngineType(engineType);
        msg.setRawSampling(sampling);
        msg.setSamplingInterval(samplingInterval);
        msg.setSamplingMode(samplingMode);
        msg.setReaderId(readerId);

        // 16
        long packets = buf.readUnsignedInt();
        // 20
        long octets = buf.readUnsignedInt();
        // 24
        long first = buf.readUnsignedInt();
        msg.setRawFirst(first);
        if (first > 0) {
            msg.setFirst(timestamp - uptime + first);
        } else {
            msg.setFirst(0L);
        }

        // 28
        long last = buf.readUnsignedInt();
        msg.setRawLast(last);
        if (last > 0) {
            msg.setLast(timestamp - uptime + last);
        } else {
            msg.setLast(0L);
        }

        msg.setId(UUIDs.timeBased().toString());
        msg.setSrcAddr(srcaddr);
        msg.setDstAddr(dstaddr);
        msg.setNextHop(nexthop);
        msg.setSrcAddrString(NetflowCommonDecoder.ipV4ToString(srcaddr));
        msg.setDstAddrString(NetflowCommonDecoder.ipV4ToString(dstaddr));
        msg.setNexthopString(NetflowCommonDecoder.ipV4ToString(nexthop));
        // 32
        msg.setSrcPort(buf.readUnsignedShort());
        // 34
        msg.setDstPort(buf.readUnsignedShort());
        // 36 is "pad1" (unused zero bytes)
        buf.readByte();
        // 37
        msg.setTcpFlags(buf.readUnsignedByte());
        // 38
        msg.setProto(buf.readUnsignedByte());
        // 39
        msg.setTos(buf.readUnsignedByte());
        // 40
        msg.setSrcAs(buf.readUnsignedShort());
        // 42
        msg.setDstAs(buf.readUnsignedShort());
        // 44
        msg.setSrcMask(buf.readUnsignedByte());
        // 45
        msg.setDstMask(buf.readUnsignedByte());
        msg.setdPkts(packets);
        msg.setdOctets(octets);

        // 46-47 is "pad2" (unused zero bytes)
        buf.skipBytes(2);
        result.add(msg);
        readIndex++;
        parentDecoder.doCheckpoint();
    }

    // if we reached this point without any further Signal errors, we have finished consuming
    //checkpoint();
    LinkedList<NetflowV5Message> returnResults = new LinkedList<>(result);
    resetState();
    return returnResults;
}

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From source file:com.superman.netty.handler.DiscardServerHandler.java

License:Apache License

@Override
public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
    try {/* w  w w  .  ja  va  2  s.com*/
        ByteBuf bb = (ByteBuf) msg;
        while (bb.isReadable()) {
            System.out.print((char) bb.readByte());
            System.out.flush();
        }
    } finally {
        // ((ByteBuf) msg).release();
        ReferenceCountUtil.release(msg);
    }
    LOGGER.info("?");
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

/**
 * Methods to read and write length coded dates in the Binary Protocol
 * /*from w ww. j ava 2 s.  c  om*/
 * if year, month, day, hour, minutes, seconds and micro_seconds are all 0,
 * length is 0 and no other field is sent if hour, minutes, seconds and
 * micro_seconds are all 0, length is 4 and no other field is sent if
 * micro_seconds is 0, length is 7 and micro_seconds is not sent otherwise
 * length is 11
 * 
 * Fields 
 *       length (1) -- number of bytes following (valid values: 0, 4, 7, 11) 
 *       year (2) -- year 
 *       month (1) -- month 
 *       day (1) -- day 
 *       hour (1) -- hour
 *       minute (1) -- minutes 
 *       second (1) -- seconds 
 *       micro_second (4) -- micro-seconds
 * 
 */
public static Date getLengthCodedDate(ByteBuf cb) throws PEException {
    final Calendar cal = Calendar.getInstance();
    cal.clear();

    short length = cb.readUnsignedByte();
    if (length >= 4) {
        cal.set(Calendar.YEAR, cb.readUnsignedShort());
        cal.set(Calendar.MONTH, cb.readByte() - 1); // MONTH is zero based
        cal.set(Calendar.DAY_OF_MONTH, cb.readByte());

        if (length >= 7) {
            cal.set(Calendar.HOUR_OF_DAY, cb.readByte());
            cal.set(Calendar.MINUTE, cb.readByte());
            cal.set(Calendar.SECOND, cb.readByte());
        }

        if (length == 11) {
            long microSeconds = cb.readUnsignedInt();
            cal.set(Calendar.MILLISECOND, (int) (microSeconds / 1000));
        }

        if (length > 11) {
            throw new PEException("Invalid length specified to date type (" + length + ")");
        }

        return cal.getTime();
    }

    return null;
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

/**
 * Methods to read and write length coded times in the Binary Protocol
 * //from   ww w.  j  av a 2  s.  c  o m
 * if days, hours, minutes, seconds and micro_seconds are all 0, length is 0
 * and no other field is sent
 * 
 * if micro_seconds is 0, length is 8 and micro_seconds is not sent
 * otherwise length is 12
 * 
 * Fields 
 *       length (1) -- number of bytes following (valid values: 0, 8, 12)
 *       is_negative (1) -- (1 if minus, 0 for plus) 
 *       days (4) -- days 
 *       hours (1) -- hours
 *       minutes (1) -- minutes
 *       seconds (1) -- seconds
 *       micro_seconds (4) -- micro-seconds
 */
public static Time getLengthCodedTime(ByteBuf cb) throws PEException {
    Calendar cal = Calendar.getInstance();
    cal.clear();
    short length = cb.readUnsignedByte();

    if (length == 0)
        return null;

    Time ret = null;

    if (length >= 8) {
        cb.skipBytes(1); // this is the sign - we are ignoring this for now
        cb.skipBytes(4); // this is "days" - we are ignoring this for now
        cal.set(Calendar.HOUR_OF_DAY, cb.readByte());
        cal.set(Calendar.MINUTE, cb.readByte());
        cal.set(Calendar.SECOND, cb.readByte());
        if (length == 12) {
            long microSeconds = cb.readUnsignedInt();
            cal.set(Calendar.MILLISECOND, (int) (microSeconds / 1000));
        }
        if (length > 12) {
            throw new PEException("Invalid length specified to date type (" + length + ")");
        }

        ret = new Time(cal.getTimeInMillis());
    }
    return ret;
}

---

From source file:com.tesora.dve.db.mysql.libmy.MyFieldPktResponse.java

License:Open Source License

private void unpackTypeInfo(ByteBuf cb) {
    int remainingPayload = cb.readableBytes();
    int charsetOffset = remainingPayload + CHARSET_OFFSET_RELATIVE_TO_EOF;
    cb.skipBytes(charsetOffset);//from   w  w w  . jav a2s .c om

    charset = cb.readByte();
    cb.skipBytes(1);
    column_length = cb.readInt();//TODO: this should be an unsigned int.  Will cause problems if length exceeds Integer.MAX_VALUE.
    column_type = MyFieldType.fromByte(cb.readByte());
    flags = cb.readShort();
    scale = cb.readByte();
    //plus two pad bytes of zero
}

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From source file:com.tesora.dve.db.mysql.libmy.MyHandshakeErrorResponse.java

License:Open Source License

@Override
public void unmarshallMessage(ByteBuf cb) {
    cb.readByte();
    setErrorNumber(cb.readShort());
    setErrorMsg(cb.slice().toString(charset));
}

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From source file:com.tesora.dve.db.mysql.libmy.MyHandshakeV10.java

License:Open Source License

@Override
public void unmarshallMessage(ByteBuf cb) {
    protocolVersion = cb.readByte();
    serverVersion = cb.readSlice(cb.bytesBefore((byte) 0)).toString(CharsetUtil.UTF_8);
    cb.skipBytes(1); // skip the NULL terminator
    threadID = cb.readInt();//www  .  j a v  a 2 s . c  om
    scrambleBuffer1st = MysqlAPIUtils.readBytesAsString(cb, 8, CharsetUtil.ISO_8859_1);
    cb.skipBytes(1);
    long sc1 = cb.readUnsignedShort();
    serverCharset = cb.readByte();
    serverStatus = cb.readShort();
    long sc2 = Long.rotateLeft(cb.readUnsignedShort(), 16);
    setServerCapabilities(sc1 + sc2);
    scrambleBufferSize = new Integer(cb.readByte());
    cb.skipBytes(10); //unused bytes
    scrambleBuffer2nd = cb.readSlice(cb.bytesBefore((byte) 0)).toString(CharsetUtil.ISO_8859_1);
    cb.skipBytes(1);
    if ((serverCapabilitiesasLong
            & ClientCapabilities.CLIENT_PLUGIN_AUTH) == ClientCapabilities.CLIENT_PLUGIN_AUTH) {
        plugInProvidedData = cb.readSlice(cb.bytesBefore((byte) 0)).toString(CharsetUtil.UTF_8);
    }
}

---

From source file:com.tesora.dve.db.mysql.libmy.MyLoginRequest.java

License:Open Source License

@Override
public void unmarshallMessage(ByteBuf cb) {
    clientCapabilities = cb.readUnsignedInt();
    boolean hasConnectDatabase = ((clientCapabilities
            & ClientCapabilities.CLIENT_CONNECT_WITH_DB) == ClientCapabilities.CLIENT_CONNECT_WITH_DB);
    maxPacketSize = cb.readInt();/*from  w w w.j av a  2 s  .com*/
    clientCharset = cb.readByte();

    cb.skipBytes(23); // login request has a 23 byte filler
    username = cb.readSlice(cb.bytesBefore((byte) 0)).toString(CharsetUtil.UTF_8);
    cb.skipBytes(1); // skip the NULL terminator
    byte passwordLength = cb.readByte();
    byte[] passwordBytes = new byte[passwordLength];
    cb.getBytes(cb.readerIndex(), passwordBytes, 0, passwordLength);
    password = new String(passwordBytes, CharsetUtil.ISO_8859_1);
    cb.skipBytes(passwordLength);
    // if the clientCapabilities flag has the CLIENT_CONNECT_WITH_DB bit set,
    // then this message contains an initial database to connect to
    if (hasConnectDatabase) {
        database = cb.readSlice(cb.bytesBefore((byte) 0)).toString(CharsetUtil.UTF_8);
        if (database.length() < 1) {
            database = null;
        }
    }
}

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